Improper control of a resource through its lifetime in Linux kernel - CVE-2026-45955
Published: May 28, 2026
Vulnerability identifier: #VU132528
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-45955
CWE-ID: CWE-664
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper resource lifecycle management in md/md-llbitmap when handling a suspend timeout in llbitmap_suspend_timeout(). A local user can trigger a suspend timeout condition to cause a denial of service.
The issue can leave the percpu_ref in a killed state permanently, making the page control structure unusable for subsequent operations.
How to mitigate CVE-2026-45955
Install security update from vendor's repository.